Hey Drick! - first off, there no such thing as stupid questions - only stupid people (Please, please, please - that was just a totally insensitive joke!) - I have the 890 myself and have never experienced that - do you mean the switch won't move (like it's stuck or blocked from moving by something?) - it's a simple slide switch with 2 locations - one on the side and one on the motor base that are interconnected - check and see if there's something alien blocking one or the other locations) - I don't think it can be put into the plunge base incorrectly because of the guide pins and gear slot - I'll take a look when I get home and see if I can tell what might be up.